What consitutes an over-rev?

[UCrazyKid]

The car is a 2002 Carrera 2 (3.6L). The redline is marked from 7,000 to 8,000 RPM. When is the fuel shut off? What is considered an over rev? I've noticed that when I am winding the car up fast and shift at about 7,000 RPM that the revs will continue to climb for a second after I am off the gas and cluch in as I select the next gear.

Is this a function of the "drive by wire" system? In other cars I have never noticed this.

Will this constitute an over-rev? Will the computer be recording these? Is there a way to find out over-rev info with out an OBDII scan tool?

Andy

[mpikounis]

As far as I know you cannot over-rev a 996 (or any modern car with a rev limiter) the way you describe. When the rev limiter engages (long before you enter the real danger zone) power is cut and revs drop. I am not 100% sure but I think the 996 revs up to 7250. The only way to over-rev the car is to change to a lower gear instead of a higher one.

[macsak]

there are 2 types of over-revs

the first type is when you hit the fuel cutoff when shifting too late

this prevents you from damaging your engine

the second type is when you downshift incorrectly, for example shift into 2nd from 5th

you need to get the clutch in ASAP, for there is nothing to help you in this situation

the ECU records the number of each type of over-revs (occurrances and number of engine revolutions affected)

the results will show up when you attach the diagnostics unit to the OBD-II port

aloha

steve

As far as I know you cannot over-rev a 996 (or any modern car with a rev limiter) the way you describe. When the rev limiter engages (long before you enter the real danger zone) power is cut and revs drop. I am not 100% sure but I think the 996 revs up to 7250. The only way to over-rev the car is to change to a lower gear instead of a higher one.